1,2,4-Trichlorobenzene
Belforest Water System
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 9 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 5 ppb
The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hormone disruption.
EPA Maximum Contaminant
Level (MCL) 70 ppb
The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-13 | AA88295 | ND |
| 2014-01-16 | AA88294 | ND |
| 2014-04-15 | AA89084 | ND |
| 2014-07-16 | AA90617 | ND |
| 2014-07-17 | AA90616 | ND |
| 2014-10-14 | AA92211 | ND |
| 2014-10-16 | AA92214 | ND |
| 2014-10-16 | AA92212 | ND |
| 2014-10-16 | AA92213 | ND |
| 2015-10-15 | AB08451 | ND |
| 2016-10-03 | AB15822 | ND |
| 2016-10-13 | AB15823 | ND |
| 2016-10-13 | AB15821 | ND |
| 2016-10-13 | AB15824 | ND |
| 2017-10-11 | AB23665 | ND |
| 2017-10-12 | AB23664 | ND |
| 2018-10-11 | AB30933 | ND |
| 2018-10-11 | AB30934 | ND |
| 2019-12-09 | AB40553 | ND |
| 2019-12-09 | AB40552 | ND |
| 2019-12-09 | AB40551 | ND |